Thanks for your reply. I initially thought they were part of variable
defined in C++ source file, but now it makes sense that these are
set/changed in python script.
One more thing, inside the O3CPU.py:
class DerivO3CPU(BaseCPU):
type = 'DerivO3CPU'
cxx_header = 'cpu/o3/deriv.hh'
The way it is defined is that Deriv03CPU inherits the BaseCPU class.
However in the deriv.hh source, it is written such that:
class DerivO3CPU : public FullO3CPU { ...
which shows the DerivO3CPU inherits the FullO3CPU. Is this ok to define
this way if they are not matched? I know that FullO3CPU is derived from
Base03CPU, which is also a child of BaseCPU class.
Thanks
On Fri, Mar 16, 2018 at 11:11 AM, Jason Lowe-Power <ja...@lowepower.com>
wrote:
> Hi Tariq,
>
> The way SimObject parameters work is explained in Part 2 of Learning gem5
> <http://learning.gem5.org/> here: http://learning.gem5.
> org/book/part2/parameters.html. It's a little convoluted (you have to go
> through python to set parameters), but it is incredibly flexible.
>
> The *defaults* for these parameters, specifically, can be found in
> src/cpu/o3/O3CPU.py. Of course, if you want to change these parameters you
> should do it in your Python config/run script. The best way is to derive a
> new class from DerivO3CPU and extend it with your own values for the
> parameters. Or, if you want to get fancy, you can add command-line
> parameters for the CPU parameters you want to change dynamically.
>
> Cheers,
> Jason
>
> On Fri, Mar 16, 2018 at 9:05 AM Tariq Slayer <tariqslaye...@gmail.com>
> wrote:
>
>> Hello,
>>
>> For O3CPU model, I have question regarding the parameters defined in in
>> DeriveO3CPU Params. Where are these params being defined? For example in
>> Fetch.cc source code, some of the arguments in the constructor's parameters
>> are listed like this:
>>
>> ...
>> decodeToFetchDelay(params->decodeToFetchDelay)
>> renameToFetchDelay(params->renameToFetchDelay),
>> iewToFetchDelay(params->iewToFetchDelay)
>> ...
>>
>> For each of these param-> var_name, Where are these variable (or
>> structure) defined? I know that these params are created in deriv.cc but I
>> couldn't find the variables listed above. (except for numThread). It is not
>> listed in BaseCPU class either.
>>
>> Also, I know there is a full documentation for InOrder CPU Model, but is
>> there full doc or tutorial for O3CPU as well? The wiki page of O3CPU looks
>> partially complete so I was hoping for any documentation that describes all
>> the pipeline stages and its internal organization inside the O3CPU.
>>
>> Thank you
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>
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